Improved car-spring



' f i.. were. "t wird .gister @anni @time ...We NW PERRY e. GARDINER, oFNEW YORK, N. Y.

Letters Patent-No. 84,688, dated December 8, 1868.

IMIPROVED CAR-SPRING.

or-f-- The Schedule referred to in these Letters Patent and making partof the same.

To all whom it may concern:

the outside of which latter three or' more India-rubber solid -springsare placed, the whole enclosed in a snitable casing, and operated by aplunger acting upon the centralIndia-rubber spring.

Figure I is a longitudinal section of the spring, at the lineC D of Fig.II, and

Figure II is a horizontal section ofthe same, at the line A B of Fig. I.

Similar letters represent similar parts.

In the accompanying drawings- E isla casing, made with four circularrecesses, F, and secured to and closed by a bottom or sole-plate, G.

In the centre of this casingE, a solid, o'r nearly solid, strongIndia-rubber spring, H, is placed, resting upon a concave projection, a,provided on the sole-plate G.

Around thisIndia-rubber central spring H, two, three, or'more datsteelpsprings, n, m, and w, are placed, arranged in such a manner thatthe cut in each spring shall come opposite, Iornearly so` to the. cut ofthe spring situated inside ofthe other. 4

The interior or central spring n is made to enclose the centralIndia-rubber spring H tight; and in the same manner the spring on titstight around the spring n, and the spring w, tits tight around thespring fm..

These springs, n, m, and w, are made of such a length as to correspondwith the whole `depth of the interior of the casing E, and act, at thesame time, as a guide for the plunger P.

Against the outside of the outer spring w, and the interior surface ofthe recesses F, made in the casing E, solid India-rubber springs J areplaced, itt-ingtight into this space, and acting against the exterior oftheiiat steel springs in such a manner as to keep the said springs tightagainst the internal and central India-rubber spring H.

These India-rubber springs J are made considerably shorter than theinternal depth of casing E, to allow for their expansion lengthwise,when the Aspring is in action.

Upon the top of the central India-rubber spring H, a plunger, P, is madeto act, providedavith a projecting bolt, Q, passing through the top ofthe casing E.

The load acting upon this bolt Q will cause the plunger P to compressthe central India-rubber spring H lengthwise, which latter beingconfined within thek steel-spring rings n, m, and 1c, will cause toexpand the said steel-spring rings, and which, in their turn, act

upon the India-rubber springs J laterally, producing,

bythe united strength of all these springs, avery strong and powerfulspring, by a Very small expenditure of material.

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

The arrangement of an India-rubber spring, H, surrounded by steel-springrings, n., m, and fw, and Indiarubber springs J, enclosed in a suitablecasing, E, in combination with a plunger, P, acting upon the centralIndia-rubber spring H, the whole being combined and operating together,in the manner and for the purpose substantially as described.

Witnesses: PERRY G. GARDINER HENRY E. Roanne, LoUIs STUMM.

